Rotary engine.



A. SCHWARZ.

ROTARY ENGINE.

APPLICATION FILED JUNE 11. I915.

1 323 9 ,829. Patented Sept; 11, 1917,

2 SHEETS-SHEET 1.

I wwm A. SCHWARZ.

ROTARY ENGiNE. APPLICATION FILED JUNEHI 19l5- 2 SHEETS-SHEET 2.

* vmfon as afluid gear, and forother purposes. The

invention broadly speaking comprises a rotary cylinder and piston eccentrically mounted with respect to each other in combination --with n'i'eans for eliminating practically all -able standards upon which the motor is sup- I UNITED STATES PATENT, OFFICE.

.ALFRED SGHWARZ, on NEW YORK, n. Y., Assxenon 'ro WILLIAM BROOKLYN, NEW- YORK. v

scnLnYgrRUsT E, or

ROTARY i To all whom it may concern:

and exact description.

The invention which constitutes the subj'ectimatter of this application relatesto an engine of the wabbling piston type; or in other words to a rotary engine provided' with an outercylinder which rotates around a central fix'ed'shaft. The invention, as will obviously appear from the detailed description below, is capable of use in connection with steam engines, internal combustion en-.

gines, air compressors, water or oil pumps,

friction 'of the parts connecting said piston and cylinder and which .parts divide the space' 'b'etweenthesaid piston and cylinder into a plurality of piston spaces. For'the sake "of clearness' however I have chosen to vention, and this embodiment is in connecti'onwith a'simple form of'steam engine in which-7' 1 Figure 1 isa longitudinal section.

Fig. 2 is a crossfsection taken on the line Referring to the drawing in detail the reference numerals 10 and 11 designate suitported, the motor in. this instance being one particularly adaptedgto be operated by the expansive force of steam. The upper end "of the standard 10 is provided with a beari inglQ' iniwh'ich is fixed by a set-screw 13 a "shaft 14' provided with an intake through which steam'is'admitted to the motor. I The standard 'llis provided with a similar bear-- ing 15, in which is fixed, as by a' set-screw '16, a hollow shaft 17 through which the I gases 'or steam is exhausted from the engine. 50

i's in aliiiementwith and connected to'the The shaft 14L, in the'construction shown,

shaft 17 This connection is preferably a screw-threaded one to p'ermit of longitudinal adjustment of'one with respectto the other. Stationary members '18 and 19 are fixedly each complete rotation of the as*will-be understood. 1* Projectinginwardly from the cylinder -heads 20 and21 are a pluralityof keys" 38, 110

andeccentrically mounted upon the shafts l4 and 17 respectively andserve as bearings 'crosssection-iand the cylinder 22 is adapted to rotate about the geometrical centerof the same. It will thereforebennderstood that "the-shafts '14 and 17 are=eccentrically positioned with respect tothe'cylinder-22.' Ro- 'tat'ably" and :concentrically' mounted upon "the shafts 14 and 17 is'what I prefer to call 'i ii'plllnflfy piston 23 and o-perating' in con- 111110131011 with the primary piston and the "outer cylinder is a--plurality of secondary pistons 24 reciprocating radially in the chanibersE, F ,*-G-and H provided therefor I and' located' in the primarypiston. The

outer ends of these secondary pistons are pivotally" connected to *arcufate members 25 which have a limited movementtircumferentially about the interior of the cylinder'22. To this end the outer edges of the-secondary cylinders are-provided with dovetail members 26 which pivotally connect the-pistons 24 and the arcuate members 25. The ends-of each of these arcu'ate members-slide circumferentially-wvithin the =arcuate spaces '27 formed by the shoulders 28- and29 of" the ill t t only f b dime tf th -inua'rcuate members-30 inconjunctionwith the outer cylinders 22 to which-said arcuate members 30 are-secured;'- I i V I The chambers-of the primary piston divide the latter into segmentalsections 32, '33, 34and 35 and these sections in conjunction with the pistons and the outercylinder de- -fin e four-piston spaces A, B,'C and D, to

which steam is admitted through the intake 'port' 35 and from which steam is discharged throughthe ex'haustpo-rt 37. r

l It'will be understoodthat' the outer cylinder, and the' 'priniary and secondary pistons have different axes'of rotation" resulting creases from maxi-mum to minimum during cylinder 22,

preferably one for each segmental section, which engage at all times with the inner circumferential wall of the recesses 39 when the engine is in operating condition and cause each and every point on the primary piston to describe a circle during a complete rotation'of the primary piston. These keys therefore establish a definite relation between the cylinder and piston. Of course the position of these keys is determined by the eccentricity of the primary piston but if I desired the cylinder heads may be provided -piston space'A and piston chamber E rehalf rotat on of the primary piston.

with anumber of key holes into which the keys may be inserted, or the keys: may themselves be mounted upon adjustable members and adjusted to the eccentricity of the primary piston. It will also be understood that the eccentricity of the primary piston is de termined in the first instance by the position of the stationary eccentricslS and 19. The ends of the arcuate members 26 project into recesses 29 formed in the cylinder heads 20 and 21. The secondary pistons therefore have a definite position with respect to the cylinder.

The operation of the device is as follows: There are, in this particular embodiment of the invention, four piston spaces A, B, C and D which are definedby the outer cylinder 22, the primary piston 23 and the sec ondary pistons 24 the latter in this instance being rectangular in shape, The fluid for operating the engine'is admitted from a suitable supply through the intake port 36 and through the ports 40 are 41 into the the port 36 in shaft 14. The ports 36 and 37 extend about half way around the shafts Hand 15 respectively and itwill be apparent that each port is in communication with each piston space for substantially onesteam or otherfluid admittedto the-piston space A cannot escape because the exhaust port thereto is closed. -The steam therefore acts against the secondary piston 24 and causes a revolution of the secondary pistons in unison with the primary pistons and cylinder- 22. Each division orpart of the engine goes through the same cycle of operations. So far as I am aware no method of keying the piston to the cylinder has been devised heretofore. This arrangement not w The ing the outer ends of said secondary only establishes a proper relation of one member to the other and prevents one member from over-running the other, but also permits free movement of both members to perform the necessary mechanical motion. The arrangement and the construction of the secondary piston and the mechanism associated therewith results in a radial movement only of the secondary pistons with respect to the center of rotation of the primary piston. As a further result of my construc tion it will be apparent that it is unnecessary' to provide a fluid-tight connection between the arcuate members 26 and the outer cylinder 22 as the steam pressure behind the pistons suffices to maintain the said members in fluid tight engagement with the bottom of the recesses 29.

To reverse the engine, in the construction illustrated,steam is admitted in the opposite direction; that is to say the exhaust port becomes the intake port and vice versa.

. What I claim is: a

1. A rotary engine, comprising a primary piston and a cylinder or casing surrounding said piston, said piston and cylinderbeing rotatably and eccentrically connected to each other, a plurality of secondary pistons slidably connected to said primary piston and slidablyengaging said cylinder thereby defining a plurality of piston spaces between the inner wall of the outer cylinder and the outer wall of the primary piston, and means for admitting fluid behind said secondary pistons and to each of said piston spaces.

2. In a device of the class described, an outer cylinder and a primary piston eccentrically mounted therein and adapted to have a differential rotation with respect thereto, and a plurality of secondary pistons slidably engaging the outer cylinder and mounted in and movable with respect to the primary piston, in combination with a plurality of keys projecting inwardly from each head of said cylinder and engaging with the primary piston to prevent one from overrunning the other. I

3. A rotary engine comprising a rotatable primary piston provided with a plurality of chambers and ports therein, in combination with an outer cylinder rotatable eccentrically with respect to the said piston, secondary pistons located and reciprocable in said chambers and defining a plurality of piston spaces, means for slidably connect- 15- tons to the cylinder to permit of the di er-' ential motion between the primary piston I and the outer cylinder, and means for ad- ,mitting fluid through said ports to said secondary chambers andfpiston spaces to force the-secondary pistons into fluid tight engagement with the outer cylinder and to rotate said piston and outer cylinder.

4. A rotary engine comprising an outer cylinder and a primary piston provided with a plurality of chambers and eccentrically mounted within said cylinder in combination with a plurality of secondary pistons slidably engaging the outer cylinder and mounted in said chambers, means for admitting a fluid behind said secondary pistons vto force the same in fluid-tight contact with said outer cylinder, said means also adapted to admit fluid to said piston spaces to rotate the said cylinder and means for connecting said secondary istons to the outer cylinder whereby the pistons-are held in a definite position with respect to said cylinder.

In testimony whereof I aflix my signature in the presence of two subscribing Witnesses.

ALFRED SCHWARZ.

copies of this patent may be obtained tor five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 7 

